Imverter welders ?

Howdy,
We have one of these at work.
eg stick welder, single phase. very portable.
This thing is easier to weld with than a mig [I am not kidding]
Anyhow.
There are a lot of cheap copies of these at very affordable prices, at the moment.
Question is are they any good ...........so has anyone used one ??
eg
http://cgi.ebay.com.au/125A-PURE-DC-MIN ... dZViewItem
We have one of these at work.
eg stick welder, single phase. very portable.
This thing is easier to weld with than a mig [I am not kidding]
Anyhow.
There are a lot of cheap copies of these at very affordable prices, at the moment.
Question is are they any good ...........so has anyone used one ??
eg
http://cgi.ebay.com.au/125A-PURE-DC-MIN ... dZViewItem